pushViewController在UINavigationBar中具有怪异的渐变

Question

[将新的viewcontroller推入堆栈时，我看到一个奇怪的渐变/蒙版大约一秒钟，然后它消失了

我有一个UINavigationController来呈现一个视图，该视图具有一个编辑按钮，该按钮可以关闭呈现的视图，并在完成处理程序中推送一个新的视图。

Answer 1

     let changevc = UIViewController() // change this code as this is  your view controller with edit button
     changeVC.modalPresentationStyle = .fullScreen //or .overFullScreen 
     self.present(changeVC, animated: true, completion: nil)